[clang] [Driver] Generalize the `addFortranRuntimeLibs` function in `PPCLinux.cpp` to all Linux platform. (PR #134297)

[Daniel Chen via cfe-commits]

https://github.com/DanielCChen created https://github.com/llvm/llvm-project/pull/134297

As suggested in PR #131041, this PR moves the code of `addFortranRuntimeLibs` from `PPCLinux.cpp` to `Gnu.cpp` to generalize it for all Linux platform.

>From a7c791a7fe3a0606fc6b79368b32d599bdfbe2fb Mon Sep 17 00:00:00 2001
From: cdchen-ca <cdchen at ca.ibm.com>
Date: Thu, 3 Apr 2025 15:43:41 -0400
Subject: [PATCH] Generalize the addFortranRuntimeLibs code to all Linux
 platform.

---
 clang/lib/Driver/ToolChains/Gnu.cpp      | 15 +++++++++++++++
 clang/lib/Driver/ToolChains/Gnu.h        |  2 ++
 clang/lib/Driver/ToolChains/PPCLinux.cpp | 15 ---------------
 clang/lib/Driver/ToolChains/PPCLinux.h   |  3 ---
 4 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index d53039f6302d2..97872ac21cfb7 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -3439,3 +3439,18 @@ void Generic_ELF::addClangTargetOptions(const ArgList &DriverArgs,
                           options::OPT_fno_use_init_array, true))
     CC1Args.push_back("-fno-use-init-array");
 }
+
+void Generic_ELF::addFortranRuntimeLibs(
+    const ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const {
+  // Link static flang_rt.runtime.a or shared flang_rt.runtime.so
+  const char *Path;
+  if (getVFS().exists(Twine(Path = getCompilerRTArgString(
+                                Args, "runtime", ToolChain::FT_Static, true))))
+    CmdArgs.push_back(Path);
+  else if (getVFS().exists(
+               Twine(Path = getCompilerRTArgString(
+                         Args, "runtime", ToolChain::FT_Shared, true))))
+    CmdArgs.push_back(Path);
+  else
+    CmdArgs.push_back("-lflang_rt.runtime");
+}
diff --git a/clang/lib/Driver/ToolChains/Gnu.h b/clang/lib/Driver/ToolChains/Gnu.h
index 3b8df71bbf9d3..bb8e9c884e10c 100644
--- a/clang/lib/Driver/ToolChains/Gnu.h
+++ b/clang/lib/Driver/ToolChains/Gnu.h
@@ -376,6 +376,8 @@ class LLVM_LIBRARY_VISIBILITY Generic_ELF : public Generic_GCC {
   void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
                              llvm::opt::ArgStringList &CC1Args,
                              Action::OffloadKind DeviceOffloadKind) const override;
+  void addFortranRuntimeLibs(const llvm::opt::ArgList &Args,
+                             llvm::opt::ArgStringList &CmdArgs) const override;
 
   virtual std::string getDynamicLinker(const llvm::opt::ArgList &Args) const {
     return {};
diff --git a/clang/lib/Driver/ToolChains/PPCLinux.cpp b/clang/lib/Driver/ToolChains/PPCLinux.cpp
index 575e88c6ab124..9305fcf2cfe49 100644
--- a/clang/lib/Driver/ToolChains/PPCLinux.cpp
+++ b/clang/lib/Driver/ToolChains/PPCLinux.cpp
@@ -102,18 +102,3 @@ bool PPCLinuxToolChain::SupportIEEEFloat128(
   return GlibcSupportsFloat128((Twine(D.DyldPrefix) + Linker).str()) &&
          !(D.CCCIsCXX() && HasUnsupportedCXXLib);
 }
-
-void PPCLinuxToolChain::addFortranRuntimeLibs(
-    const ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const {
-  // Link static flang_rt.runtime.a or shared flang_rt.runtime.so
-  const char *Path;
-  if (getVFS().exists(Twine(Path = getCompilerRTArgString(
-                                Args, "runtime", ToolChain::FT_Static, true))))
-    CmdArgs.push_back(Path);
-  else if (getVFS().exists(
-               Twine(Path = getCompilerRTArgString(
-                         Args, "runtime", ToolChain::FT_Shared, true))))
-    CmdArgs.push_back(Path);
-  else
-    CmdArgs.push_back("-lflang_rt.runtime");
-}
diff --git a/clang/lib/Driver/ToolChains/PPCLinux.h b/clang/lib/Driver/ToolChains/PPCLinux.h
index 910df3d16e6a5..63adaff6be9c2 100644
--- a/clang/lib/Driver/ToolChains/PPCLinux.h
+++ b/clang/lib/Driver/ToolChains/PPCLinux.h
@@ -24,9 +24,6 @@ class LLVM_LIBRARY_VISIBILITY PPCLinuxToolChain : public Linux {
   AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                             llvm::opt::ArgStringList &CC1Args) const override;
 
-  void addFortranRuntimeLibs(const llvm::opt::ArgList &Args,
-                             llvm::opt::ArgStringList &CmdArgs) const override;
-
 private:
   bool SupportIEEEFloat128(const Driver &D, const llvm::Triple &Triple,
                            const llvm::opt::ArgList &Args) const;